Armored pneumatic tire.



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J.T.RYAN. ARMORED PNEUMATIC TIRE.

APPLICATION FILED MAR. 26, 1908. RENEWED SEPT. 19, 1911.

1,@63,291 g Patented June 3, 1913.

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13%55! 7' 1 WJTNE'SASES. 3%? n 7 Wa :5 7 4M1 W li iilii 4" W UNITEDsraras PATENT orrica JOHN T. RYAN, or VALLEJO, eemronma, AssIenon. froAMERICAN TIRE ABMOR COMPANY, OF PHOENIX, ARIZONA, A CORPORATION OFARIZONA.

Amotmn ruamarm man.

Application meamamn 28, 1908, Serial No. 428,292. Renewed September 19,19111. aerial No. 650,256.

fornia, have invented certain new and useful Improvements in ArmoredPneumatic-Tires, of which the following is a specification.

My invent-ion relates to the class of armored pneumatic-tires, andparticularly 1 to that type in which a non-puncturable metallic shieldis applied to the danger-exposed area of the tire.

In the application of a metallic armor to a pneumatic-tire, especiallywhen that armor is a relatively rigid'piece of metal, that is, one notcomposed of articulated scales or plates involving flexibility, regardmust be had to preserving the resiliency of the covered tire. In otherwords, the armor must be of such a character and so applied that whileserving its purpose as an armor, it is really an adjunct to the tire,and not a rigid, inflexible tire in itself simply inclosing apneumatic-tube; for, in such case, the tube would be of no service.Consequently, a metallic armor must be such, and so applied, that itsfunction is subserved, without detracting from the purpose of thepneumatictire. To accomplish this is the general object of my invention;and in so doing, further objects are to get a better bearing between thearmor and tire, which while preserving the resiliency of the tire, willprevent any tendency of the armor to creep or slip thereon, will avoidexcessive sound due to resonance, and will exclude foreign substancesfrom between them.

To these ends my invention consists in the ,novel armored pneumatic-tirewhich I shall now fully describe, by reference to the accompanyingdrawings in which- Figure 1 is a side view, partly broken, and insect-ion, of my tire. Fig. 2 is a crosssect-ion of the same on the lineww of Fig. l.

1 is the pneumatic-tire, which, for illustration, is here shown as asingle tube tire, though it is to beunderstood that said tube may alsostand for and represent the outer casing of a double tube tire. I haveshown the tire 1 as resting inthe wheel-rim 2 without attempting to showmeans for securing it, as these form no part of my invention.

3 is a non-puncturable shield, preferably a metallic one, which isapplied to the tire Patented June 3, 191 3.

throughout its circumference and covers as much of its cross-section asis necessary, both to protect the danger-area of the tire, and to beitself held on by the inflation of said tire. The shield may have a welldefined tread portion of any suitable character, such as 4, though thisis not essential. The inner surface ofthe shield 3 does not, in themain, directly or immediately, under normal conditions,bear upon thetire, but said shield is either formed with or has secured to it, byrivets 5, as here shown, any suitable number of transverse or crossbearing strips 6, separated from each other by appreciable intervals,and disposed on and projecting from the inner surface of the shield,with a thick ness greatest at the median plane and thence diminishing toeach end, as seen in Fig. 2. These strips 6 bear throughout their lengthon the tire I and separate the shield therefrom. In the presentinvention, these strips 6 are not the only bearings which the shield hason the tire. There are also median circumferentially disposed bearingsbetween the two, in the intervals between said strips 6. In the bestform they consist of thickened portions 7 of the tire'itself, whichportions extend to the inner surface of the shield. These thickenedportions are on the tire at intervals throughout its circumference andlie between the cross bearings 6, as seen in Fig. 1. Their width is suchas to leave on each side of them clear spaces, as shown in Fig. 2, whichclear spaces are bounded by the sides of the thickened portions, thesides of the tire, the sides of the shield and the cross bearings 6. Theobject of the cross bearings 6 is to provide normally vacant spaces intowhich the tire is permitted to expand by distortion under pressure,thereby preserving its resiliency and giving all the advanta es to bederived from a pneumatic cushloru These normally vacant spaces need not,however, be the full area of the intervals formed by said crossbearings, but are best located and confined to the sides,.because thedistortion of the tire naturally lies in these lines, so that the fullefl ect of such spaces may be had, at the same time that a moreextensive bearing is given the shield on the tire, which results in aformed by the middle portion of the cross strips 6 and by theintervening circumferential bearings 7, is practically continuous and isin a position to yield a firm connection between shield and tire and yetnot to detract from or interfere with the purpose and advantage of thevacant spaces afforded by the spaced cross bearings 6. I v

Anotherimprovement in my tire lies in providing or forming its sideswith projecting annular ribs 8 which lie at the extremities of theshield 3. These form with said extremities a good joint'to excludeforeign substances. Both this bearing at the ribs 8 and thecircumferential. tread bearings 7 have the further advantage of reducingand preventing the emission of a hollow sound due to resonance from thevacant spaces.

- Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is- An armored tire comprising a pneumatic tireprovlded with aplurality of circumferentially disposed separated ribsprojecting from the periphery thereof, a non-puncturable rigid archshaped shield overlyingthe tire-=andaresting upon the circumferentialribs projecting therefrom, and a plurality of transversely disposedspaced bearings arranged between the outer surface of the tire and saidshield and positioned between the circumferential ribs projecting fromthe tire,

the circumferential ribs and bearings engag- In testimony whereof I havesigned my name to this specification in the presence of two subscribingwitnesses.

JOHN T. RYAN. Witnesses:

WM. F. BOOTH, D. B. RICHARDS.

